Efficient concrete overlays

Concrete overlays have a long history and proven success in the state of Iowa. Mitchell and Worth counties in north central Iowa have led the way. In the past three years, they have put down approximately 241km of 102mm concrete overlay. Concrete Foundations Inc. (CFI), based out of Hiawatha, Iowa, has slipformed almost 80km of the counties' overlays, including 45km this paving season near the town of Osage. CFI has slipformed most of the overlays with its GOMACO two-track GP-2600 paver. This season, the co
February 15, 2012 Read time: 2 mins
Efficient concrete overlays are being achieved with the use of stringless controls

Concrete overlays have a long history and proven success in the state of Iowa. Mitchell and Worth counties in north central Iowa have led the way. In the past three years, they have put down approximately 241km of 102mm concrete overlay.

Concrete Foundations Inc. (CFI), based out of Hiawatha, Iowa, has slipformed almost 80km of the counties' overlays, including 45km this paving season near the town of Osage.

CFI has slipformed most of the overlays with its 218 Gomaco two-track GP-2600 paver. This season, the company added the Leica Geosystems stringless system and a new GOMACO four-track GHP-2800 paver to the inventory. Both were put to work on the project near Osage.

The new unbonded concrete overlay is 6.7m wide, and the material is placed directly on the existing asphalt surface of the roadway. The surface only has to be swept clean before the mix is dumped on it and concrete slump averages around 13-25mm.

The firm has seen increased production with fewer people needed for stringline maintenance and setup. Five site personnel who normally worked with the stringline are now used elsewhere during the paving process. The lack of stringline also allows them to focus more on quality and production rather than stringline maintenance.

The GOMACO GHP-2800 is pulling burlap for a burlap drag finish behind the paver. Finishers work behind the paver with bull floats before a texture/cure machine applies a longitudinal tine and white spray cure.
Concrete milling, paving & compaction

For more information on companies in this article

Related Content

  • Swiss mini-motorways made bigger
    July 10, 2012
    Widening the busy A4 road in Switzerland to four lanes was achieved quickly by using the latest paving technology. Increased traffic required the widening of the A4 from two to four lanes along a 20km section, with two lanes separated by a central divider in each direction. Carrying 20,000-25,000 vehicles/day, the trunk road between Winterthur and Schaffhausen was one of Switzerland's busiest two-lane stretches, and as a result, the Federal Council of Switzerland in Bern planned an enlargement of the dual-l
    Read More
  • Durability is crucial while warm mix technology can help disaster recovery
    February 21, 2013
    Why durability is crucial for both emerging and developed economies, and how warm mix technology can help disaster recovery - Kristina Smith reports. When CORE Construction, a 100% owned Ghanaian company, started working on road construction projects five years ago, it was difficult to source the right bituminous mixes. “In the past, most construction firms had a number of challenges when it came to bituminous works, since the local capacity was not well-developed,” said CORE CEO Frank Lartey. CORE’s soluti
    Read More
  • Wirtgen is increasing its concrete paving range
    January 6, 2017
    Wirtgen continues to develop its slipformer line-up with the addition of three new SP80 series models, each of which is built along modular lines and available in two versions. These machines are the SP81 and SP81i, the SP82 and SP82i and Sp84 and SP84i and are said to be designed to suit a wide range of applications, offering high-precision paving and ease of use.
    Read More
  • Wirtgen is increasing its concrete paving range
    February 4, 2013
    Wirtgen continues to develop its slipformer line-up with the addition of three new SP80 series models, each of which is built along modular lines and available in two versions. These machines are the SP81 and SP81i, the SP82 and SP82i and Sp84 and SP84i and are said to be designed to suit a wide range of applications, offering high-precision paving and ease of use.
    Read More

Highlighted Content